<?php
namespace lemon\widgets\ueditor;

use Yii;
use yii\base\Action;
use yii\helpers\ArrayHelper;
use lemon\widgets\ueditor\Uploader;

class UeditorAction extends Action
{
	/**
	 * 配置文件
	 * @var array
	 */
	public $config = [];
	
	public function init(){
		//close csrf
		Yii::$app->request->enableCsrfValidation = false;
		//默认设置
		$_config = require(__DIR__ . '/config.php');
		//load config file
		$this->config = ArrayHelper::merge($_config, $this->config);
		parent::init();
	}
	
	public function run(){
		$action = Yii::$app->request->get('action');
		switch ($action) {
			case 'config':
				$result = json_encode($this->config);
				break;
			/* 上传图片 */
			case 'uploadimage':
				/* 上传涂鸦 */
			case 'uploadscrawl':
				/* 上传视频 */
			case 'uploadvideo':
				/* 上传文件 */
			case 'uploadfile':
				$result = $this->ActUpload();
				break;
			/* 列出图片 */
			case 'listimage':
				/* 列出文件 */
			case 'listfile':
				$result = $this->ActList();
				break;
			/* 抓取远程文件 */
			case 'catchimage':
				$result = $this->ActCrawler();
				break;
			default:
				$result = json_encode(array(
					'state' => '请求地址出错'
				));
				break;
		}
		/* 输出结果 */
		if (isset($_GET["callback"])) {
			if (preg_match("/^[\w_]+$/", $_GET["callback"])) {
				echo htmlspecialchars($_GET["callback"]) . '(' . $result . ')';
			} else {
				echo json_encode(array(
					'state' => 'callback参数不合法'
				));
			}
		} else {
			echo $result;
		}
	}
	
	/**
	 * 上传
	 * @return string
	 */
	protected function ActUpload(){
		$base64 = "upload";
		switch (htmlspecialchars($_GET['action'])) {
			case 'uploadimage':
				$config = array(
					"pathFormat" => $this->config['imagePathFormat'],
					"maxSize" => $this->config['imageMaxSize'],
					"allowFiles" => $this->config['imageAllowFiles']
				);
				$fieldName = $this->config['imageFieldName'];
				break;
			case 'uploadscrawl':
				$config = array(
					"pathFormat" => $this->config['scrawlPathFormat'],
					"maxSize" => $this->config['scrawlMaxSize'],
					"oriName" => "scrawl.png"
				);
				$fieldName = $this->config['scrawlFieldName'];
				$base64 = "base64";
				break;
			case 'uploadvideo':
				$config = array(
					"pathFormat" => $this->config['videoPathFormat'],
					"maxSize" => $this->config['videoMaxSize'],
					"allowFiles" => $this->config['videoAllowFiles']
				);
				$fieldName = $this->config['videoFieldName'];
				break;
			case 'uploadfile':
			default:
				$config = array(
					"pathFormat" => $this->config['filePathFormat'],
					"maxSize" => $this->config['fileMaxSize'],
					"allowFiles" => $this->config['fileAllowFiles']
				);
				$fieldName = $this->config['fileFieldName'];
				break;
		}
		/* 生成上传实例对象并完成上传 */
		$up = new Uploader($fieldName, $config, $base64);
		/**
		 * 得到上传文件所对应的各个参数,数组结构
		 * array(
		 *	 "state" => "",		  //上传状态，上传成功时必须返回"SUCCESS"
		 *	 "url" => "",			//返回的地址
		 *	 "title" => "",		  //新文件名
		 *	 "original" => "",	   //原始文件名
		 *	 "type" => ""			//文件类型
		 *	 "size" => "",		   //文件大小
		 * )
		 */
		/* 返回数据 */
		return json_encode($up->getFileInfo());
	}
	/**
	 * 获取已上传的文件列表
	 * @return string
	 */
	protected function ActList(){
		/* 判断类型 */
		switch ($_GET['action']) {
			/* 列出文件 */
			case 'listfile':
				$allowFiles = $this->config['fileManagerAllowFiles'];
				$listSize = $this->config['fileManagerListSize'];
				$path = $this->config['fileManagerListPath'];
				break;
			/* 列出图片 */
			case 'listimage':
			default:
				$allowFiles = $this->config['imageManagerAllowFiles'];
				$listSize = $this->config['imageManagerListSize'];
				$path = $this->config['imageManagerListPath'];
		}
		$allowFiles = substr(str_replace(".", "|", join("", $allowFiles)), 1);
		/* 获取参数 */
		$size = isset($_GET['size']) ? htmlspecialchars($_GET['size']) : $listSize;
		$start = isset($_GET['start']) ? htmlspecialchars($_GET['start']) : 0;
		$end = (int)$start + (int)$size;
		/* 获取文件列表 */
		$path = $_SERVER['DOCUMENT_ROOT'] . (substr($path, 0, 1) == "/" ? "" : "/") . $path;
		$files = $this->getfiles($path, $allowFiles);
		if (!count($files)) {
			return json_encode(array(
				"state" => "no match file",
				"list" => array(),
				"start" => $start,
				"total" => count($files)
			));
		}
		/* 获取指定范围的列表 */
		$len = count($files);
		for ($i = min($end, $len) - 1, $list = array(); $i < $len && $i >= 0 && $i >= $start; $i--) {
			$list[] = $files[$i];
		}
//倒序
//for ($i = $end, $list = array(); $i < $len && $i < $end; $i++){
//	$list[] = $files[$i];
//}
		/* 返回数据 */
		$result = json_encode(array(
			"state" => "SUCCESS",
			"list" => $list,
			"start" => $start,
			"total" => count($files)
		));
		return $result;
	}
	/**
	 * 抓取远程图片
	 * @return string
	 */
	protected function ActCrawler(){
		/* 上传配置 */
		$config = array(
			"pathFormat" => $this->config['catcherPathFormat'],
			"maxSize" => $this->config['catcherMaxSize'],
			"allowFiles" => $this->config['catcherAllowFiles'],
			"oriName" => "remote.png"
		);
		$fieldName = $this->config['catcherFieldName'];
		/* 抓取远程图片 */
		$list = array();
		if (isset($_POST[$fieldName])) {
			$source = $_POST[$fieldName];
		} else {
			$source = $_GET[$fieldName];
		}
		foreach ($source as $imgUrl) {
			$item = new Uploader($imgUrl, $config, "remote");
			$info = $item->getFileInfo();
			array_push($list, array(
				"state" => $info["state"],
				"url" => $info["url"],
				"size" => $info["size"],
				"title" => htmlspecialchars($info["title"]),
				"original" => htmlspecialchars($info["original"]),
				"source" => htmlspecialchars($imgUrl)
			));
		}
		/* 返回抓取数据 */
		return json_encode(array(
			'state' => count($list) ? 'SUCCESS' : 'ERROR',
			'list' => $list
		));
	}
	/**
	 * 遍历获取目录下的指定类型的文件
	 * @param $path
	 * @param $allowFiles
	 * @param array $files
	 * @return array|null
	 */
	protected function getfiles($path, $allowFiles, &$files = array()){
		if (!is_dir($path)) return null;
		if (substr($path, strlen($path) - 1) != '/') $path .= '/';
		$handle = opendir($path);
		while (false !== ($file = readdir($handle))) {
			if ($file != '.' && $file != '..') {
				$path2 = $path . $file;
				if (is_dir($path2)) {
					$this->getfiles($path2, $allowFiles, $files);
				} else {
					if (preg_match("/\.(" . $allowFiles . ")$/i", $file)) {
						$files[] = array(
							'url' => substr($path2, strlen($_SERVER['DOCUMENT_ROOT'])),
							'mtime' => filemtime($path2)
						);
					}
				}
			}
		}
		return $files;
	}
}
